例1：
来源：http://long546324.iteye.com/blog/349946
Default.aspx文档：
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title>上传图片</title> </head> <body> <form id="form1" runat="server"> <div> <asp:FileUpload ID="FileUpload1" runat="server" /> <asp:Button ID="btnFileUpload" runat="server" Text="上传" onclick="btnFileUpload_Click" /> </div> </form> </body> </html>
Default.aspx.cs文档 ：
1 using System; 2 using System.Configuration; 3 using System.Data; 4 using System.Linq; 5 using System.Web; 6 using System.Web.Security; 7 using System.Web.UI; 8 using System.Web.UI.HtmlControls; 9 using System.Web.UI.WebControls; 10 using System.Web.UI.WebControls.WebParts; 11 using System.Xml.Linq; 12 13 public partial class _Default : System.Web.UI.Page 14 { 15 protected void Page_Load(object sender, EventArgs e) 16 { 17 18 } 19 protected void btnFileUpload_Click(object sender, EventArgs e) 20 { 21 Boolean fileOK = false; 22 //获取上传的文件名 23 string fileName = this.FileUpload1.FileName; 24 //获取物理路径 25 String path = Server.MapPath("~/Images/"); 26 //判断上传控件是否上传文件 27 if (FileUpload1.HasFile) 28 { 29 //判断上传文件的扩展名是否为允许的扩展名".gif", ".png", ".jpeg", ".jpg" ,".bmp" 30 String fileExtension = System.IO.Path.GetExtension(fileName).ToLower(); 31 String[] Extensions = { ".gif", ".png", ".jpeg", ".jpg" ,".bmp"}; 32 for (int i = 0; i < Extensions.Length; i++) 33 { 34 if (fileExtension == Extensions[i]) 35 { 36 fileOK = true; 37 } 38 } 39 } 40 //如果上传文件扩展名为允许的扩展名，则将文件保存在服务器上指定的目录中 41 if (fileOK) 42 { 43 try 44 { 45 this.FileUpload1.PostedFile.SaveAs(path + fileName); 46 MessageBox( "文件上传完毕"); 47 } 48 catch (Exception ex) 49 { 50 MessageBox("文件不能上传，原因：" + ex.Message); 51 } 52 } 53 else 54 { 55 MessageBox( "不能上传这种类型的文件"); 56 } 57 } 58 59 protected void MessageBox(string str) 60 { 61 Page.ClientScript.RegisterStartupScript(Page.GetType(), "message", "<script language='javascript' defer>alert('"+str+"');</script>"); 62 } 63 }
例2：
public static bool UpFileFun(FileUpload Controlfile, string[] FileType, int FileSize, string SaveFileName) { string FileDir = Controlfile.PostedFile.FileName; string FileName = FileDir.Substring(FileDir.LastIndexOf("\") + 1); //获取上传文件名称 string FileNameType = FileDir.Substring(FileDir.LastIndexOf(".") + 1).ToString(); //获取上传文件类型 int FileNameSize = Controlfile.PostedFile.ContentLength; //获取上传文件大小 // 定义上传文件类型，并初始化 string Types = ""; //string strDate = DateTime.Now.ToString();//取当前时间用来修改上传文件名 //string str = strDate.Replace("/", "").Replace(":", "").Replace(" ", ""); //过滤当前时间里的特殊字符，如: - / : , //HttpContext.Current.Response.Write("<hr><br>" + str + "<br><br><br><hr"); string EditFileName = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss fff").Replace(" ", "_").Replace(":", "-") + Guid.NewGuid().ToString(); //string strNewFileName = Guid.NewGuid().ToString(); //HttpContext.Current.Response.Write("<hr><br>" + strNewFileName + "<br><br><br><hr"); try { if (FileNameSize < FileSize) { for (int i = 0; i < FileType.Length; i++) { if (FileNameType == FileType[i]) { Types = FileNameType; } } if (FileNameType == Types) { Controlfile.PostedFile.SaveAs(HttpContext.Current.Server.MapPath(SaveFileName) + "/" + EditFileName + FileName); return true; } else { Jscript.Alert("上传失败！上传文件类型不符合"); return false; } } else { Jscript.Alert("上传失败！上传文件尺寸超出限制"); return false; } } catch { return false; } }
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